Figure 2.

Alignment procedure of multiplanar reconstruction windows for the cone-beam computed tomography-based length measurements. The red, yellow, and blue lines indicate the sagittal, coronal, and axial planes, respectively. A, The intersection of the sagittal and coronal planes is aligned with the center of the pulp chamber in the axial view of the tooth to be measured. B, The sagittal plane is rotated in the coronal view of the tooth such that it passes through the buccal cusp and root tips. C, The coronal plane in the sagittal view of the tooth is rotated such that it passes through the buccal cusp and root tips, while ensuring that the sagittal plane also passes through the buccal cusp and root tips. D, Verification that the sagittal and coronal planes pass through the buccal cusp and root tips by moving the axial slice until the cusp or root tip disappears. E, Measurement of crown, root, and total tooth lengths in the sagittal view of the tooth. These measurements were performed similarly to the corresponding direct measurements.